William Boswell Lowther, Dictionary of National Biography… (1892)
“ In 1838–9 Jackson was for the first time chosen president of the Wesleyan conference. A hundred years had just passed since the formation of the first Methodist Society by the brothers Wesley, and Jackson prepared a centenary volume, describing the origin and growth of methodism, and the benefits springing from it (1839) . In the centennial celebration he played a leading part, and preached before the conference in Brunswick Chapel, Liverpool, the official sermon, which occupied nearly three hours in delivery. ”
